C++ Programming Code Examples C++ > Strings Code Examples C++ Program to Find Length of Longest Common Substring C++ Program to Find Length of Longest Common Substring #include<iostream> #include<cstring> using namespace std; // A utility function to find maximum of two integers int max(int a, int b) { return (a > b)? a : b; } /* Returns length of longest common substring of X[0..m-1] and Y[0..n-1] */ int LCSubStr(char *X, char *Y, int m, int n) { int LCSuff[m + 1][n + 1]; int result = 0; for (int i = 0; i <= m; i++) { for (int j=0; j<=n; j++) { if (i == 0 || j == 0) LCSuff[i][j] = 0; else if (X[i-1] == Y[j-1]) { LCSuff[i][j] = LCSuff[i-1][j-1] + 1; result = max(result, LCSuff[i][j]); } else LCSuff[i][j] = 0; } } return result; } int main() { char X[] = "Happy Codings"; char Y[] = "C++ Programming Language Code Examples :)"; int m = strlen(X); int n = strlen(Y); cout << "Length of Longest Common Substring is " << LCSubStr(X, Y, m, n); return 0; }